Mosquitoes infected with the West Nile malaria virus have been discovered in the northern Negev\'s Shikma Brook, near Kibbutz Or HaNer. The Health Ministry has already begun taking steps to prevent the virus from spreading. The relatively rainy winter and the late rains have led to large ponds and puddles, which serve as breeding grounds for mosquitoes. It rained lightly last night in several areas, and more is expected today.